Electric bell and buzzer.



H. G. OSBORNE;

ELECTRIC BELL AND BUZZER;

APPLICATION FILED SEPT. 18, 1916' Patented Juiy 31, 1917.

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gnuawiio p L $4. M 6} 4850/9415 7 351 {MAJ Qttmcw HENRY G. OSBORNE, OF BROOKLYN, NEW YORK.

ELECTRIC BELL AZN'D BUZZER.

Specification of Letters Patent.

Patented July 31, 1917.

Application filed September 18, 1916. Serial No. 120,684.

when fipressed inwardly, to close the circuit and e ect the sounding of the bell or buzzer and when automatically moved outwardly, as usual, serving to break the clrcuit.

The invention pertains more particularly to a novel construction and arrangement of the parts composin the bell or buzzer whereby a device 0 simple character but highly efiicient and durable and capable of convenient manufacture, is produced.

The bell of my invention preferably comprises a base having an outwardly directed central tubular portion or hub, an ironclad electromagnet secured in the sald tubular portion and extending above the same, a gong detachably secured over said magnet and base and suitable circult conductors for operating the hammer of the bell, all of which will be understood from the detailed description hereinafter presented, reference being had to the accompanymg drawings, in which:

Figure 1 is a top view of all of those portions of the bell located below the gong;

Fig. 2 is a central vertical section through the same on the dotted line 2 2 of Flg. 1, the gong being shown in posltlon;

Fig. 3 is a side elevation, partly 1n central vertical-section, of a modified construction of bell embodying some of the features of my invention, and

Fig. 4 is a diagram of the circult for the bell shown in Fig. 3.

Referring to Figs. 1 and 2 of the drawings, which show a bell with parts stamped from sheet metal embodying the features of mv invention, 10 designates the base for the bell, 11 the gong and 12 the bell hammer. The base 10 has a disk bed-plate or upper portion 13 and an annular rim 14: extending at right angles thereto, a chamber thus being formed within the base 10 to receive and permit the proper action of the bell-hammer 12 and the bell-hammer carrier 15 carrying the same. The disk 13 of the base 10 has at its center ortion a tubular hub 16. In forming the ub 16 I preferably form a small hole at the center of the disk 13 and then press the metal of said disk out to create said hub, hence the hub is integral with the other portions of the base.

Within the hub 16 of the base is secured a tubular iron shell 17 within which is secured by means of a screw 18, a suitable electromagnet 19, the lower end of the core of which is exposed at about the center of the space defined by the lower rim of the shell 17. The plane in which the lower rim of the shell 17 and the exposed surface of the core occurs may be either coincident with or below the surface of the disk 13. The screw 18 enters the core of the electromagnet and has upon it a nut 20 by which it may be firmly bound in position, said .nut being adapted to engage, when screwed downward upon the screw 18, the upper end of the shell 17. The upper portion of the screw 18 extends through the gong l1 and receives upon its end an acorn nut 21 of familiar type, this nut serving to conceal the upper end of the screw and to bind the gong 11 firmly in position. Upon the removal of the nut 21 the gong 11 may be detached from the other portions of the bell if such should be desired, without disturbany of the other mechanism of the When the hub 16 is made of magnetic material a ring 46 composed of fiber, brass, or other non-magnetic material is interposed between said hub 16 and shell 17 to prevent the conductance of magnetic lines of force away from the shell 17 The efiect of shell 17 about the electro-magnet 19 is to increase the pull of the coil by utilizing the strength of the pole remote from the arinature, this strength being transferred magnetically through the shell to its rim which is located in about the same transverse plane 46 and hub 16 by any suitable means; when l the hub is of sheet metal said parts may be conveniently secured together by merely indenting with a center punch the adjacent surfaces of said parts.

The presence of the shell 17 over the electro-magnet 19 imparts an iron-clad effect to said magnet and fully protects the same against accidental damage either during the assembling of the parts of the bell or when the gong 11 is removed and also against the action of any dust or the like that might gather below the gong 11 or upon the base 10. All parts of the structure that are adjustable are so arranged that they can be readily manipulated when the gong only is removed.

The shell 17 can be so set as to have its outer rim located at an appreciable distance below the disk 13, in which case the nonmagnetic ring 46 may be omitted. Also if the base 10 and the disk 13, or the hub 16, should be of non-magnetic material the said insulating ring 16 may be omitted. Furthermore, when the non-magnetic ring 46 and a magnetic hub are used, the shell 17 and the electro-magnet 19 contained therein may be arranged to bring the lower rim of said shell near the underside of disk 13, as shown.

However, if desired, the base 10, disk 13, hub 16 and shell 17 may be made of cast metal, either integrally, or separately, and entirely of magnetic metal or only the shell may be of magnetic metal, in which case the non-magnetic ring 46 may be omitted provided the open rim of the shell projects adequately beyond the disk. I

The hammer carrier 15 is connected with an armature or block 22 secured upon a spring plate 23 which is fastened at one end by rivets 24c to a piece of fiber or other insulating material 25 supported by the disk 13 of the base 10. The spring-plate 23 constitutes a portion of the bell-hammer carrier and is yielding and extends from the fiber 25 below the electro-magnet 19 and toward two screw contacts 26, 27 carried by circuit breaker posts 28, said posts being fastened to a strip of fiber or other insulating material 29 supported by the disk 13.

have an oscillatory motion, said plate tend-' ing to move away from the electro-magnet at its free end portion by virtue of its inherent spring tension and being adapted to be drawn toward the magnet by the core and shell of the magnet 19 when the latter is energized. The circuit breaker posts 28 which support the contact screws 26, 27 will preferably be formed of sheet metal bent into inverted U-shape, the opposite sides of said posts being perforated to receive the contact screws 26, 27 held by suitable adjusting nuts 33 therefor. The lower ends of the strips of metal from which the circuit breaker posts 28 are formed are bent laterally and then downwardly and extended through slits in the strip of fiber 29 and thence bent laterally toward each other against the lower surface ofsaid strip 29, as shown in Fig. 2, whereby the posts become suitably connected with said strip, which strip insulates said posts from the base 10. The strip of fiber 29 may be secured in any convenient manner to the base 10, but I prefer to secure said strip upon said base by means of lips 3 cut from the material of the base and bent over upon the upper surface of said strip, as shown at the right hand portion of Fig. 1 and in section in Fig. 2. It will be seen, therefore, that the circuit breaker posts 28 of the construction described may be secured to the strip 29 without the aid of screws or rivets and that said strip may be fastened upon the base 10 without the aid of screws or rivets. The base 10 is formed with an opening below the strip 29, as indicated in Fig. 1, the ends of said strip extending beyond said opening and hence being held upon the upper surface of the base 10 by means of the lips 34. The sheet or strip of fiber or other insulating material 25 to which the fixed end of the spring plate 23 is secured, is placed at the under-surface of the disk 13 of the base 10 and supported below a suitable opening formed in, said disk by meansof lips 35 formed from the metal of said disk, as shown in Figs. 1 and 2, said disk being provided with one lip 36 which extends over the upper edge of the strip or plate of insulating material 25 so as to aid in holding the same down on the lips 35. The ends of the strip or plate" 25 extend beyond the ends of the opening in the disk 13, as indicated by the dotted lines in Fig. 1, and hence said plate or strip 25 cannot move upwardly through the opening above it in the disk 13. The strip or plate 25 has secured to it the binding posts 37, 38 of customary character to which the circuit conductors 39, 4.0 are respectively secured, the conductor 39 extending to an ordinary push-button 4:1 and thence to a battery 42 to which the conductor 40 extends from the post 38. A circuit conductor 43 extends from the binding post 38 td the circuit breaker post28 for the contact screw 27, and from the binding post 37 a COIldIlCtOIlA: extends to the electro-magnet 19 and thence a conductor -45 extends to the circuit breaker post 28 the screw contacts 26, 27 and at such time the circuit may be completed by merely pressing the push button 41 inwardly, as

usual, the circuit then being from the battery, through the conductor to the binding post 38, thence through the conductor 43 to the circuit breaker post for the screw contact 27 thence through the contact points 32 and contacting strip 31 to the screw contact 26, thence through the conductor to the magnet, thence through the conductor 44 to the binding post 37, and thencethrough the conductor 39 back to the push-button 41 and batterv 42. When the push button is pushed inwardly to complete the circuit, the electro-magnet 19 becomes energized and draws the armature 22, spring plate 23, and bell hammer upwardly, with the result that the bell hammer will strike the gong 11 and that the plate 23 will carry the contact oints 32 and conducting contact strip 31 from electrical engagement with the screw contacts. 26, 27 thereby breaking the circuit, upon the happening of which the bell-hammer 12 and plate 23 will immediately descend aid said plate 23 then carrying the contact strip 31 into reengagement with the screw contacts 26, 27 will again complete the circuit, and thereupon the bell-hammer 12 will at once ascend and again strike the gong 11. The rapid making and breaking of the circuit will continue -so long as the inward pressure is maintained on the push-button 41, the circuit being broken each time the plate 23 is moved upwardly to cause the hammer 12 to strike the gong and to carry the contact strip 31 from the screw contacts 26, 27, and being re-made each time the plate 23 descends to carry the strip 31 into reengagement with the screw contacts 26, 27 and lower the bellhammer. There will, therefore, be a continuous sounding of the gong. or ringing of the bell while the pressure of the finger remains on the push-button 41. When the pressure on the push-button 41 is finally relieved the circuit will be broken at that point and the parts will assume their original position as shown in Fig. 2. The insulating strip 30 which carries contact strips 31 is mounted at the upper end of plate 23. The plate 23 is thereby kept free from electrical contact with current carrying parts. The plate 23 may, however, have its free end carried upwardly and. be fitted with heat resisting contacts to engage the screw contacts 26, 27 in lieu of carrying the non conducting strip 30 and conducting strip 31. I deem it preferable, however, to insulate the plate 23 and employ asimple strip 31 for, at the proper time, connecting the contacts 26, 27. The insulating strip 25 may be omitted. the plate-.23 then riveted directly to the disk 13 and the two binding posts 37, 38 separately insulated from the disk 13. I prefer, however, to make use of th1s lnsulatmg strip as an additional precaution against accidental grounds.

The bell illustrated in Figs.- 1 and 2 is of the continuous ringing type, the ringing contlnulng so long as pressure remains on the push button 41 to complete the circuit. A portion of my invention is, however, applicable to single-stroke bells, and hence in Figs 3 and 4 I illustrate the invention as applied to a single-stroke bell. Fig. 3 being a modification I designate the base by the numeral and the gong by the numeral 51. The chambered base 50 in its essential characteristics is the same as the base 10 shown in Figs. 1 and 2, the bed-plate or disk portion thereof being designated by the numeral 52 and the'annular right-angle flange by the numeral 53. The centralportion of the disk 52 is directed outwardly to form the central tubular hub 54 as heretofore explained with reference to the hub 16, and within the hub 54 is secured the shell 55 of the iron-clad magnet as indicated in Fig. 2. The ring 71 of non-magnetic material is interposed between hub 54 and shell 55. in

similar manner and for similar purposes as of the ring 46 heretofore described; also under similar conditions hereinbefore specified it is possible to omit the ring 71, and

also to cast integrally the base 50, the disk 52, the hub 54 and shell 55. For a singlestroke bell the screw contacts 26, 27 of Figs. 1 and 2 are not employed and consequently in Fig. 3 I do not illustrate said contacts nor the parts immediately operative therewith. In Fig. 3, 56 denotes the bell-hammer spring or carrier and 57 the hammer arranged to strike the gong 51. Upon the spring 56 is secured an armature or block 58 corresponding with the armature .22 of Fig. 2 adapted to be drawn by the. core and shell of the electro-magnet 63 when said magnet is energized. The spring 5.6 is secured at one end to a strip or plate of fiber .59 supported by lips 60 against the undersurface of the disk 52 in the same manner that the strip or plate 25 is supported in the construction shown in Figs. 1 and 2. Upon the strip or plate of fiber or other insulating material 59 is secured customary binding posts 61, 62 (Fig. 4) and said posts are connected with the eleetro-magnet 63 by conductors 65, 66, respectively. I This strip of fiber 59 may be omitted and the two binding posts 61 and 62 mounted on the disk 52 and separately insulated. therefrom in any suitable manner; the spring 56 would then be riveted directly to the disk 52. From the binding post 62 a conductor 67 leads to a push-button 68 connected with the battery 69 and from the binding post 61 each inward pressure of the push button d8 to complete the circuit after an automaticoutward movement thereof breaking the circuit thereat. The electro-magnet 63, shell 55, gong 51'and base 50 having the hub 54, are substantially identical with the like features illustrated in Figs. 1 and 2, and I present Fig. 3 to indicate that my invention is not in every part limited to a continu: ously ringing bell.

Referring again to Figs. 1 and 2 a further utilization of my invention may be effected by eliminating the gong or the hammer car- -rier 15 and hammer 12 or all said parts,

thereby creating what is known in the trade as a buzzer. In the event that the gong 11 be omitted, if desired, the circuit breaker lposts 26, 27, contact strip 31 and other exposed features may be protected by any suitable covering means.

WVhat I claim as my invention and desire to secure by Letters Patent, is:

1. In an electric bell, a base having a bedplate open at its center and thereat a hub, an iron-clad electro-magnet secured within said hub, a gong mounted over said magnet, a bell-hammer carrier secured at one end and extending across one end of the magnet to be actuated in one direction therefrom, binding posts supported by said base, and suitable conductors and circuit closing means for said posts and magnet.

'2. In an electric bell, a base having a bedplate open at its center and thereat an outwardly extending integral hub, an iron-clad electro-magnet secured within said hub, a gong mounted over said magnet, a bell-hammer carrier secured at one end and extending across one end of the magnet to be actuated in one direction therefrom, binding posts supported by said base, and suitable conductors and circuit closing means for said posts and magnet.

3. In an electric bell, a base having a bedplate' open at its center and thereat a hub,

an iron-clad electro-magnet secured within said hub, means magnetically insulating said iron-clad electro-magnet from said bedplate, a gong mounted over said magnet, a bell-hammer carrier secured at one end and extending across one end of the magnet to be actuated in one direction therefrom, binding posts supported by said base, and suit meta;

able conductors and circuit closing means for said posts and magnet.

4. In an electric bell, a base having a bedplate open at its center and thereat an outwardly extending integral hub,- an iron-clad electro-magnet. secured within said hub means magnetically insulating said iron-cla electro-magnet from said bed plate, a gong mounted over said magnet, a bell-hammer carrier secured at one end and extending across one end-of the magnet to be actuated in one direction therefrom, binding posts supported by said base, and suitable con ductors and circuit closing means for said posts and magnet.

6. In a sounding device, a base having a.

bed-plate open at its center and thereat a hub, an iron-clad electro-magnet secured within said hub, means magnetically insulating said iron-clad electro-magnet from said bed plate, an armature secured at one end and extending across one end of the magnet to be actuated in one direction therefrom, binding posts supported by said base, and suitable conductors and circuit closing means for said posts and magnet.

7 In an electric bell, a base having a bedplate open at its center and thereat a hub, a tubular shell closed at one end and open at the other end, and secured within said hub, an electro-magnet secured within said shell and exposing its core at one end thereof, a gong mounted over the said shell, electromagnet and bed-plate, a bell-hammer carrier secured at one end and extending across the end of the magnet and core to be actuated in one direction therefrom, binding posts supported by said base, and suitable conductors and circuit closing means for said posts and magnet.

8. In an electric bell, a base having a bedplate open at its center and thereat a hub, a tubular shell closed at its outer end and open at its inner end and secured within said hub, an electro-magnet secured within and to the outer end of said shell and exposing its core at the inner end of said hub, a gong secured over the outer end of said shell, a bell-hammer carrler secured at one end and extending across the inner end of the magnet to be I actuated in one direction therefrom, binding posts supported by said base, and suitableover the shell being a screw extending through the gong and shell and into the core of themagnet, with suitable nuts therefor.

said binding posts and the fixed end of said carrier are secured, and suitable conductors and circuit closing means for said posts and magnet.

10. In an electric bell, a base havin a bedplate, an iron-clad electro-magnet t ereon,

. means magnetically insulating said iron-clad electro-magnetfrom said bed-plate, a gong over said magnet, a bell-hammer carrier secured at one end and extending across the exposed end of the magnet to be actuated in one direction therefrom, binding posts supported by said base, insulating material se cured to said base and to which said binding posts and the fixed end of said carrier are secured, and suitable conductors and circuit closin means for said posts and magnet.

11. 11 an electric bell, a base having a bedplate open at its center and thereat an out wardly extending integral hub, an electromagnet mounted in said hub and exposing its core through the inner end thereof, a gong over said magnet, a bellhammer car rier secured at one end and extending across the exposed end of the magnet to be actuated in one direction therefrom, binding posts supported by said base, and suitable conductors and circuit closing means over said posts and magnet' 12. In a sounding device of the character I described, a base having a bed-plate open at its center and thereat provided with an integral hub, an electro-magnet in said hub and exposing its core through the same, an armature carrier secured at one end and supporting an armature across the exposed end of the magnet to be actuated in one direction therefrom and having a laterally extending portion, two circuit contacts adjacent to the said extending portion of said carrier, binding posts for the main line conductors, and suitable conductors connecting said binding posts, with said magnet and said circuit contacts.

13. In an electric bell, a base having a bed-plate open at its center, a tubular shell closed at one end and open at its other end and secured to said bed-plate at the open center thereof, an electro-magnet within said shell and exposing its core at the open center of" the bed-plate, a gong over said shell, a bell-hammer carrier secured at one end and extending acros the exposed end of the magnet to be actuated in one direction therefrom, binding posts supported by said base and suitable conductors and circuit.

closing means-for said 14. In an electric bed-plate open at its posts and magnet. bell, a base having a center and thereat provided with an outwardly extending integralhub, an electro-magnet mounted in said hub and exposing core through the end thereof, a gong over saidmagnet, a bellhammer carrier secured at one end and extendmg acrossthejexposed end of the magnet to be actuated in one direction therefrom and having an upwardl. extending portion,two circuit contacts ad acent to the upwardly extending portion of said carrier, binding posts for the main line conductors, and suitable conductors connecting .said l) 111d11lg posts with said magnet and said clrcuit' contacts.

15. In an electric bell, a chambered base having a bed-plate open .at its center, a tubular shell closed at its outer end and open at its inner end and secured to said bed-plate at the open center thereof, an

electro-magnet wlthin said shell and exposing its core at the open center of the bedplate, a gong over the outer end of said shell, a bell-hammer carrier secured at one end and extending across the inner end of the magnet to be actuated in one direction therefrom and having an upwardly extending portion, two circuit contacts adjacent to the upwardly extending portion of said carrier, binding posts for the main line conductors and suitable conductors connecting said binding posts with said magnet and said circuit contacts.

16. In an electric bell, a chambered base having a bed-plate open at its center and thereat provided with an outwardly extending integral hub, an electromagnet within said hub and exposing its core through the inner end thereof, a gong over said magnet, a bell-hammer carrier secured at one end and extending across the inner end of the magnet to be actuated in one direction therefrom and having an upwardly extending portion provided with a conducting strip insulated from said carrier, two circuit contacts adjacent to said conducting strip and to cooperate therewith, binding posts for the main line conductors and suitable conductors connecting said binding posts with' tubular shell closed at its outer end and open at its inner end and secured to said bedplate at the open center thereof, an electromagnet within said shell and exposing its core at the open center of the bed-plate, a gong over the outer end of said shell, a bellhammer carrier secured at one end and extending across the inner end of the magnet to be actuated in one direction therefrom and having an upwardly extending portion provided with a conducting strip insulated from said carrier, two circuit contacts adjacent' to said conducting strip and to cooperate therewith, bindlng osts for the main line conductors and suita 1e conductors connecting said binding posts with said magnet and'said circuit contacts.

18. In an electric bell, a chambered base having a bed-plate open at its center and thereat provided with an outwardly extending integral hub, a tubular shell closed at'its outer end and open at its inner end and secured to said hub, an electro-magnet secured within said shell and exposing its core at the open center of the bed-plate, a gong over the wardly extending portion,'tw0 circuit c'0n-" tacts adjacent to the upwardly extending portion of said carrier, binding posts for the main hne conductors, and suitable conductors connecting. said binding posts with said magnet and said circuit contacts.

Slgned at New York city, in the county of New York and State of New'York, this 15th day of September, A. D. 1916.

HENRY-Gr. OSBORNE. I Witnesses:

ARTHUR MARION, Cms. C. Gran. 

